Recovery of Yttrium and Dysprosium from the Rare Earth Concentrate, Southwestern Sinai, Egypt

Fawzy, Mohamed; El-Hady, S.M.

doi:10.21608/ajnsa.2018.6508

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…One such attempt is to separate yttrium and dysprosium from REEs concentrate using two types of techniques: direct precipitation and solvent extraction. Direct precipitation is first used to separate Y using a carbonate and hydrogen peroxide system, followed by a solvent extraction technique to separate Dy using Cyanex 272 [45].…”

Section: Introductionmentioning

confidence: 99%

"Individual Separation of Yttrium and Dysprosium Oxides from the Rare Earths Product obtained from Xenotime Mineral Concentrate"

El Hady

2024

Arab Journal of Nuclear Sciences and Applications

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The separation of ytrrium and dysprosium from the REEs product (48.15% Y2O3, 11.05% Dy2O3) obtained from a xenotime mineral concentrate was studied. The REEs chloride liquor is prepared followed by precipitation of yttrium using lactic acid. The optimum conditions of the yttrium precipitation included 2 M lactic acid concentration, lactic acid pH 5 with L(REEs solution) /L(lactic acid) 1/0.75 at contact time of 168 h at 25 o C. The extraction of dysprosium from Y-free REE chloride solution was investigated using PC88A (2-Ethylhexyl 2-ethylhexy phosphonic acid). The optimal conditions of the dysprosium extraction were an extractant concentration of 2.2 M, 1/1 O/A ratio in a chloride solution at pH 3, and 9 min., as contact time. While the optimal conditions of its stripping considered 1.5 M H2SO4 in 1/1 O/A ratio for 20 min., as stripping time. Ultrapure products of Y and Dy were prepared and analyzed using ICP-MS.

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Section: Introductionmentioning

confidence: 99%

"Individual Separation of Yttrium and Dysprosium Oxides from the Rare Earths Product obtained from Xenotime Mineral Concentrate"

El Hady

2024

Arab Journal of Nuclear Sciences and Applications

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“…1 -6. From the latter, yttrium is extracted by three diverse strategies; direct precipitation (15,16) , ion exchange resin (17)(18)(19) and solvent extraction (20,21). (5)…”

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confidence: 99%

Solvent Extraction of Yttrium from Rare Earths Concentrate Using Cyanex 272 and PC88A

El Hady

2024

Bulletin of Faculty of Science, Zagazig University

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The recovery of yttrium using cyanex 272 & PC88A from the REEs concentrate which produced from xenotime-bearing ferruginous sandstone, southwestern Sinai was studied. Cyanex 272 solvent is known as a purified bis(2.4.4-trimethylpentyl) phosphinic acid and PC88A solvent is also known as a purified 2-Ethylhexyl 2-ethylhexy phosphonic acid (HEHEHP). From a solution of rare earths chloride that prepared, the optimum conditions for yttrium extraction included mixture of 1.4 M cyanex 272 & 1.8 M PC88A / 0.25 M isodecanol in kerosene, 1/1 O/A ratio, the prepared liquor pH 3 and contact time 12 min. The decided optimum conditions of yttrium stripping are 3 M HNO3 in 1/1 O/A ratio for contact time 25 min. McCabe-Thiele diagram for yttrium extraction and stripping are created. Very pure product of yttrium was prepared and analyzed using ICP-MS.

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Recovery of Yttrium and Dysprosium from the Rare Earth Concentrate, Southwestern Sinai, Egypt

Abstract: Separation of ytrrium and dysprosium from the prepared chloride liquor of HREEs concentrate (44.1% Y, 9.04% Dy, 5.15% Er, 4.56% Gd, 2.31% Yb, 1.33% Ho, and 1.23% Sm) has been studied.

Cited by 2 publications

References 19 publications

"Individual Separation of Yttrium and Dysprosium Oxides from the Rare Earths Product obtained from Xenotime Mineral Concentrate"

"Individual Separation of Yttrium and Dysprosium Oxides from the Rare Earths Product obtained from Xenotime Mineral Concentrate"

Solvent Extraction of Yttrium from Rare Earths Concentrate Using Cyanex 272 and PC88A

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